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    <title>代码练习</title>
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    <h1>这是一个标题</h1>
    <p>这是一个段落</p>
    <a href="https://www.baidu.com/">百度超链接</a>
    <img src="https://www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png" width="258" height="100" />
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